KitsuMUCK is a furry roleplaying MUCK themed around kitsune. While the majority of the creatures on its world are kitsune, all species are welcome to join and have fun. It is centered around an ongoing story line that takes place in two different worlds, namely Kitsuria and S'Fyra, with a moderate connection to Earth. Kitsuria and S'Fyra are both densely populated with kitsune. Kitsuria is more technologically advanced and set in more modern times than S'Fyra, whose inhabitants rely heavily on magic. You can find out most of the background story by checking the boards on the MUCK's site.